Introduction to RJ45 Connector

RJ45 connector is commonly known as crystal head. It is the transparent plug that connects the network card or HUB, which is used to connect the two ends of the twisted pair. RJ-45 is a network interface specification, similar to the RJ-11 interface, which is the "telephone interface" we usually use to connect telephone lines. The reason why it is called "crystal head" is because of its crystal clear appearance. Both ends of the twisted pair must be installed with this RJ-45 plug, so that it can be inserted into the RJ-45 interface of the network card (NIC), hub (Hub) or switch (Switch) for network communication.

At present, there are many brands and types of RJ45 connectors on the market, but if the industry is an industrial customer, the RJ45 connector needs to have excellent sealing and waterproof performance and ensure that the signal is not attenuated. There are still relatively few RJ45 connectors in the market. . Among them, the Bulgin brand created by British Art Lai is more ideal.

RJ45 Connector - RJ45 Connector Line Connection Order

Commonly used B-standard RJ-45 line connection sequence is orange-white, orange, green-white, blue, blue-white, green, brown-white, brown. When connecting different devices, use the A mark, and the connection sequence is green-white, green, orange-white, blue, blue-white, orange, brown-white, brown. Generally, the pressing method of the B mark is commonly used. If you want to cross the line, one side is the A mark and the other side is the B mark.

RJ45 Connector - Industrial RJ45 Connector

In the development of modern industry, mechanical forces such as severe heat, dust, moisture, corrosive fluids, gases and/or vibrations are generated in the process of industrial processing. These factors will cause fatal damage to the stable transmission of cable lines. threaten. Therefore, Bulgin has launched a series of industrial RJ45 waterproof connectors for the above harsh environments: waterproof and dustproof IP68 up to IP68 level when connected

Fits Cat 5e connectors - data rates up to 100MHz

PUR cable jacket - resistant to chemicals and has excellent water resistance

Shielding system - high noise immunity and EMI protection

Cat 5e Shielded Coupler - maintains shielding function

Anti-misplug, protect the RJ45 connector and prevent the wrong direction

Nut lock - secure locking system

Wired version - convenient for various application terminals

PCB Mount Panel Connector

IDC terminal panel connector - simple terminal structure

Panel Header with Ground Wire - Connects to the Shell of the Panel Mount Connector

RoHS Compliant

    RJ45 Connector - RJ45 Connector Wiring Standard

There are two types of twisted pair cables for RJ45 connectors: one is a straight cable that is widely used, and the other is a crossover cable used in special cases. In the case of unequal status, a straight connection line is used, and if the two connected devices are equal, such as two PCs, notebooks, etc., a crossover line is used. The difference between the two is that the line sequence is inconsistent. , the interface is the same.

The way to cross the line is:

One end adopts 568A standard, 568A standard practice: green-white-1, green-2, orange-white-3, blue-4, blue-white-5, orange-6, brown-white-7, brown-8

One end adopts 568B standard, 568B standard practice: orange-white-1, orange-2, green-white-3, blue-4, blue-white-5, green-6, brown-white-7, brown-8

The practice of parallel lines is: use the same standard at both ends (the same as the 568A standard or 568B standard)

☆When connecting to gigabit network, it is slightly different: one end is: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown; the other end is: white-green, green, white-orange, white-brown, brown , orange, blue, white-blue.

RJ45 Connector - Precautions for RJ45 Connector Production

If it is a hand-made RJ45 connector, also known as a crystal head, you can make the shrapnel of the crystal head face outward and the wire inlet downward, from left to right, follow the above line sequence, and fully insert the wire (to the The copper core of the twisted pair is seen on the top as the standard), and then clamp it with a network cable pliers, and that‘s it.